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燕岗-普雄间列车牵引采用双机联挂,由于该区段坡度大、隧道多而长,所以补机的油、水温不好降,手柄不能往高提,直接影响机车功率的发挥和列车运行速度。特别是苏雄-凉红间9.5公里线路上就有6个隧道,总长度达7137米,其中最长的1980米。同时隧道里坡度大,其中最大的为15.6‰,长710米;另一段13.6‰的坡度长达1150米。在这两段隧道里,补机的油水温度上升很快,稍不注意就卸载,成为成昆线上的“卡脖”区段。在夏天,手柄一般都只提到7～8位,油水温度高的机车
Yan Gang - Puxiong trains the use of dual-link, due to the section of the slope, the tunnel and long and long, so fill machine oil, water temperature is not good drop, the handle can not go to the high lift, a direct impact on locomotive power and Train speed. In particular, there are 6 tunnels on the 9.5 km line between Suxiong and Liang-hong, with a total length of 7,137 meters, of which the longest is 1,980 meters. At the same time, the gradient of the tunnel is large, of which the largest is 15.6 ‰ and the length is 710 meters. The other section of 13.6 ‰ has a slope of 1150 meters. In these two tunnels, the fill water temperature of the machine rose quickly, unnoticed to unload, becoming a line of “Kabao” on the Kunming line. In the summer, the handle is generally mentioned only 7 to 8, locomotive oil and water temperature